So I have been trying to find range friendly (brass), inexpensive, 7.62x39 ammo and have had no luck. I use the Yugo M67, but am running low. Plan B was to reload it and when I add up the brass, primers, powder, and bullets it's more than I wanted too (~ $0.50 / round). Does anyone reload this and if so any tips on where I can buy the bullets and brass for less?

Yep, I do, for my x39 AR.
I've gradually built up a supply of about 3K pieces x39 brass by buying once-fired off this board as well as Gunbroker. It's out there.
I watch Grafs, Midway USA and other sources for sales on blem and bulk FMJ bullets for AK/SKS rounds and VMAX/ZMAX for the AR.
Same for powder (now exclusively Accurate 1680) and primers (usually Wolf LR and SR). I also buy powder in 8lb jugs, with the savings usually about covering the hazmat fee.
Note that the Berry's RN bullets are pretty cheap, but I've had feeding issues in AKs and my AR. The SKSs have no issue at all.
Once you have supply of brass, you should be able to reload for less than .30 a round.

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Finding 7.62x39 Boxer primed brass is kinda tough. I'd suggest buying the Fiocchi or Prvi Partizan 7.62x39 ammo in bulk. The brass is good, and the rounds are just a touch above 50c/round.

The cheapest bullets are the ones you cast yourself, if that's an option in your case. Barring that, you might want to look for 100 to 110gr bullets for the .32 S&W/S&W Long/H&R Magnum cartridges. They are typically 0.314" and would probably work great in an AK's action. They most certainly work well in a Mosin, but that's a bolt gun.

To give you an idea how cheap ammo used to be; I bought some Lapua 7.62x39, brass cased, boxer primed, 30 per box, I think about $5 a box. I thought I only had 4 boxes but rummaging thru the stash I realized I had 10 boxes. Found 60 rounds of Winchester at the same time, also brass and boxer. Current Graf's catalog has the Lapua at $36.39 per 30 and the Winchester is $16.59 for 20. I'll never use this, don't have a bolt gun and all the autoloaders fling the brass so I'd lose half of it the first time I fired it. This was '95.

If I'm seriously going to reload 7.62x39, it's going to be for a CZ 527 bolt gun like what Hickok45 demo'ed a while back. An AK's chambers are generous, which is part of why it's so dang reliable, so when you full-length resize that brass, you're working it extra. Don't expect to get a bunch of reuses out of brass used in an AK.